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5(8x-1)-7(4x+1)=9-8(7-4x)

Răspuns :

5(8x-1)-7(4x+1)=9-8(7-4x)
40x-5-28x-7=9-56+32x
12x-12=-47+32x
12x-32x=-47+12
-20x=-35
x=[tex] \frac{-35}{-20} [/tex] / :5
x=[tex] \frac{7}{5} [/tex]
5(8x-1)-7(4x+1)=9-8(7-4x). 40x-5-28x-7=9-56+32 . 12x-12=32x-47. 12x-32x=-47+12. -20x=-35. x=-35 : (-20) \:5. x=-7 : (-4). x=1,75 COROANA ???